Sash-fastener



(No Model.)

G. H. AYLWORTH.

SASH FASTENER.

No. 396,320. Patented Jan. 15, 1889.

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UNITED STATES PATENT OFFICE.

GEORGE ITI. AYLIVORTH, OF BRIGHTON, ILLINOIS.

sAsH-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 396,320, dated January15, 1889.

Application iiled .Iuly 20, 1888. Serial No. 280,551. (No model.)

sash-lock which shall be cheap, simple in construction, and reliable andeii'ective iu operation.

To these ends the invention consists in a suitable case or box providedwith a guide groove or slot in its bottom, and curved circularly-movablelocking-bolt within the case, and having its inner end guided andcontrolled by the guide-slot in the bottom.

In the accompanying drawings, which illustrate my invention and form apart of this specification, Figure l is a face or top view with the topor cover of the case removed and the locking -bolt in retractedposition, as when the sash in unlocked. Fig. 2 is a similar view showingthe bolt projected, as when the sash is locked.

A designates the case, which'is preferably rectangular in shape, thoughit may be made in any other preferred form, and d the surrounding rim,which is cut away at a to form an opening, through which the bolt isprojected in locking.

CL2 designates a curved slot in the bottom of the case, the curvature ofsaid slot preferably coinciding' with the curvature of the bolt.

B -designates the locking-bolt, which is curved, as shown in thedrawings. inner side, at a distance from its locking end, is a shoulder,l2, which comes in contact with a stop, o3, within the case at one sideof the opening through which the bolt is projected, and by which thelocking movement of the bolt is limited. The inner end of the bolt has astud or pin projecting from its under side, which pin projects into thegroove or slot a2 to guide and control the movement of this end of thebolt, the opposite or locking On its end being' controlled by theopening' in the case through which it is projected.

C designates a spring, which maybe of any preferred form and applied inany suitable manner, to proj ect the bolt. As shown in the drawings, itis formed of spring-wire bent or coiled at the center to form. a loop,c, which is placed over a pin or stud, o4, rising from the bottom ot'the case, one end of the spring bearing against the side of the case andthe other against a pin or shoulder on the bolt.

At the end of the case, below the opening for the bolt, is a hollowedseat, a5, in which the end of the bolt rests when in it-s retractedposition. The action of the spring C being in the direction of a linebetween its bearingpoint on the bolt and the seat a5, the bolt Will beheld in retracted position till its locking' end is thrown forward uponthe outwardly-inclined portion a6 of the seat, when the curvature of thebolt will permit the spring to throw it easily forward.

IVhile I prefer to give the slot d2 the same curvature-z'. c., the sameradius-as the bolt, and to describe it from a point which shall bring itand the opening in the case through which the bolt is proj ected intothe same circle, it may have a greater or less radius and may bedescribed from a different center. By changing the radius of the slot orits angle with respect to the opening through Which the bolt isprojected, so as to bring the two ends of the bolt into circles ofdifferent radius or linto circles of the same radius described fromdifferent centers, the locking end of the bolt may be made to standhigher or loWer when projected, and may thus be caused to act as a leverto hold the sash up or down to prevent rattling. The bolt is providedwith the usual button or handle for operating it, which handle projectsthrough a slot in the cover (not shown) of the case.

Vhile I have 'shown a spring for projecting the bolt, I desire to statethat this is not an essential part of my invention, and may be omittedif preferred, leaving the bolt to act by gravity.

Having now described my invention, I clai1nl. In a sash-look, theeombinationof :L ease having in its bottom a curved guide slot orgroove, and 2L curved bolt having at its inner end :L pin which projectsinto said guide-slot and governs the movement of the inner end of thebolt when the latter is proj eoted.

2. In a sash-look, the combination, with the ease having' in its bottom:L curved guide slot or groove, u?, of :L curved bolt7 B, having at itsinner end a pin which projects into Said 1o guide-slot, and n. spring,C, 'for projecting the bolt, substantially as shown and described.

In testimony whereof I LfliX my Signa-ture in presence of two Witnesses.

GEORGE H. AYIVORTII. IVitneSses:

W. H. GooDELL, G. D. AYLWORTH.

